Spinal PunctureAnesthesia, SpinalPuncturesSpinal DysraphismSpina Bifida OccultaSpinal CordSpina Bifida CysticaSpinal Cord InjuriesCerebral ArteriesMeningomyeloceleAnencephalyPost-Dural Puncture HeadacheCerebral InfarctionCerebral PalsyCerebrovascular CirculationInjections, SpinalMiddle Cerebral ArteryNeural Tube DefectsBrainSpinal NervesCerebral AngiographySpinal CanalSpinal Cord DiseasesHydrocephalusSpinal Nerve RootsInfarction, Middle Cerebral ArteryMalaria, CerebralSpinal Cord NeoplasmsNeedlesCerebral Veins